What's the difference between pertinacious and tenacious?

Pertinacious


Definition:

  • (a.) Holding or adhering to any opinion, purpose, or design, with obstinacy; perversely persistent; obstinate; as, pertinacious plotters; a pertinacious beggar.
  • (a.) Resolute; persevering; constant; steady.

Example Sentences:

  • (1) During the Nazi regime, the official "health command" policy monitored by the Nazi party promoted home delivery under midwife supervision, both by pertinacious propaganda and partly also by decrees and ordinances.

Tenacious


Definition:

  • (a.) Holding fast, or inclined to hold fast; inclined to retain what is in possession; as, men tenacious of their just rights.
  • (a.) Apt to retain; retentive; as, a tenacious memory.
  • (a.) Having parts apt to adhere to each other; cohesive; tough; as, steel is a tenacious metal; tar is more tenacious than oil.
  • (a.) Apt to adhere to another substance; glutinous; viscous; sticking; adhesive.
  • (a.) Niggardly; closefisted; miserly.
  • (a.) Holding stoutly to one's opinion or purpose; obstinate; stubborn.

Example Sentences:

  • (1) The insurgency is still raging, and the president will have to inspire the security forces, choose generals to lead the fight, and plot tactics to beat a tenacious and experienced enemy.
  • (2) RSL trying to get their own flowing passing game going now, but the Timbers looking tenacious in midfield to break it up.
  • (3) Another factor is the decline of caste, the tenacious Indian social hierarchy which still determines the status of hundreds of millions.
  • (4) A tenacious Anabaena epiphyte was also discovered inhabiting the surfaces of root nodules.
  • (5) His family belonged to the Ghanchi caste, low down on the tenacious social hierarchy that still often defines status in India, and had little money.
  • (6) Another facilitating factor which is discussed is that blowing the nose may catch tenacious mucus which has partly passed through the ostium by the ciliary activity in the sinus.
  • (7) Malta continued to defend tenaciously after half-time and Italy struggled to create openings, despite their overwhelming dominance.
  • (8) However, attempts to cultivate M phi for morphological and functional studies have often been compromised because M phi adhere rapidly and tenaciously to cultureware.
  • (9) The exudate, apparent as early as 48 hours after inoculation, drained from the cervix as a tenacious, mucopurulent discharge for several days, then rapidly disappeared.
  • (10) Thirty-four patients, 21 male and 13 female, with chronic asthma and tenacious mucoid expectoration were studied regarding clinical parameters, PEF, airway resistance and sputum viscosity measured according to the n.m.r.
  • (11) Mark Lewis and Charlotte Harris, two tenacious solicitors, were followed around, together with their children.
  • (12) The cholla cacti are particularly tenacious in the manner in which the spines stay embedded in the skin.
  • (13) The action of complement is considered in terms of a more tenacious bond formed between effector and target cells.
  • (14) Two immunologically distinct proteins of 55 and 26 kd, which are tenaciously, but noncovalently associated with Oxytricha macronuclear DNA termini, have been purified.
  • (15) So they fought tenaciously, first over prices and then over privatisation.
  • (16) But the Justice Department attorney Ron Wiltsie, who impugned Xenakis’s credentials in tenacious cross-examination, said Dhiab had committed “five assaults since April 2014”.
  • (17) The observation that glucose phosphates bind to the Li+ complex of phosphoglucomutase some 900 times more tenaciously than to the corresponding Mg2+ complex could provide a partial rationale for the lack of reactivity of the Le+ form of the enzyme.
  • (18) "For rural areas, farmers, dalits (those at the bottom of India's tenacious social hierarchy), weak and the pained, this government is for them.
  • (19) [Small Talk, like the all-action investigative journalist that it is, tenaciously refuses to let the question go] And you're other half, she's an Irish pool international?
  • (20) Isis will then be reduced to what it once was: a very brutal and tenacious Iraqi militant organisation.